Lost In Cyberia Posted May 9, 2017 Share Posted May 9, 2017 So I noticed that all wifi analyzers, and readers, display the signal strength of wireless hotspots, and wireless connections in decibels, but in miliwatts. Furthermore, no matter what signal I look at it's always a negative number. I've seen ranges all the way from -23 down to -78 dBm. At first this confused me as I never saw any positive numbers, I assumed that the negative was bad no matter what... But thinking about it.. One the receiving end of an analyzer..the signal strength must ALWAYS be negative right? If I put it like this, you can't hear something louder than it was originally sent. So if the wifi router is sending a signal out at 0dBm, and my analyzer picks it up at 0dBm, then it received a 100% signal, but more likely it'll be reduced, hence the negative numbers.. So my main question is if the wifi transmitter was sending out a signal at like 6dBm, and my analyzer picks it up reasonally well, would it still have a positive like maybe 3 dBM? How would the receiver know that the transmitter was sending it at 6dBm in the first place? It doesn't know the transmitters starting power so it would assume that anything that the transmitter is sending would be 0dBm right? Does this sound about right? Quote Link to comment Share on other sites More sharing options...
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